(3fXe GdELGRGJ aj GdOhd GdYQHjI (B/s - (3ahRj MHjTs ((3GdbGgQI (B:s (3GdefXeI GdYQHjI ddYdhe GdEOGQjI,s, 1974)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdELGRGJs; (3GdhXjaI GdYGeIs; (3Mbhb GdehXa GdYGes